Demonstrating device for suction cleaners



0h 14, 1952 WHHTE 2,613,454

DEMONSTRATING DEVICE FOR SUCTION CLEANERS Filed June 10, 1949 INVENTOR. Harry B, While ATTORNEY.

Patented Oct. 14, 1952 DEMONSTRATING DEVICE FOR SUCTION CLEANERS t Harry Bi White, Canton, Ohio, assignor to The Hoover Company, North Canton, Ohio, a corporation of Qhio Application June 19, 1949, Serial No. 98,235

6. Quin The present.invention relates to suctionclean- .ing devices andinparticular to a filter structure designed to .be inserted in a suction air. conduit ad ted tube connectedto suitable dusting tools. Another objectoi the'invention is to provide a small filter mounting devic which forms a rigid,

lowingspecification and claims and upon considering theattached drawing in which:

Figure l .is aside view partly in section illustrating my improved filtering unit mounted in a dusting tool suction: air conduit; and

Figure 2 is perspectiue view drawn upon a smaller scale illustrating the filter unit per se withthe filter cover in open position.

The unit or accessory comprising the present invention is adapted to be removably connected to a dustingtool unit to :form' a part of the air conduitbetween a dusting tool and a suction cleaner proper. Itsfunction is to filter the dirt carrying air which passes through th dusting tool ..unit;in response to the suction created by theoleanenand to remove from that air, for a relatively short period oftime, the foreign matter therein contained for purposes of illustration to-a prospective purchaser of the cleaning propertiesof the dusting tool.

Referring to the drawing in detail and first to Figure 2 the unit comprises a central housing .5 hi h m y be a casting, adapted to house a small sheet of'filtering material 2 such as paper as will appear more fully hereinafter. One end of the housing I carries a short extending conduit section 3 adapted to be connected, for example, to the usual dusting tool hose of suction cleaning element. The other end of the housing I carries a shortconduitsection 4 having, in the illustrated embodiment, a reduced end section 5 which is adapted to beconnected to a manipulating wand or the like which carries a dusting toolon its end' s shown more particularly in Figure 1 the conduit section t is shownbroken and connected directly-to a bristle carrying suction air cleaning dusting tool 6 which may be usedforcvarious cleaning purposes' The conduits 3 and 4 telescope into hollow sockets 8 and 9 respectively in the housing [and are secured therein as by rivets I 0 and. respectively.

The central portion of the housing I between the sockets 8 and 9 isenlarged and, comprises substantially flat bottom wall I joining flat u'pstanding side Walls M which merge into a rounded top wall [9. The top wall ,i'd land side Walls M are removed along the linesiormed'by a pair of planes intersecting at an angle of approximately 90 and cutting a vertical transverse plane through the center of housing l at ins ne of approximately to form a deep V-shaped notch [2. A barrier wall [3 rises from the .bottom wall I to the line ofthe apex of thenotch l2. As shown in Figure 1 the wall 13 risesgra'd ually from the wall I on each side .of its apexto reduce turbulence in the suction air stream which flows through housing I in use. r

A perforated rigid screen It is mounted within thehousing' I having its-loweredge engaging in a, notch l6 at the upper edge of thepartition l3 andits top and side portions resting againsta seat I! extending along the side and topedges of the right hand orfupstr-earn, Figure 1, side'o'f the notch 12." A bolt l8 extends through thes'cljeen l5 and into the body I to anchor the firmly in place.

The .down stream portion of the housing lad- 'acent to the conduit 4 is provided with a pair of spaced upstanding cars 20 at the upper portion thereof and slightly rearwardly" of 'the'jdown stream faceofthe notch l2.v .The ears]20fsupporta pintle 2|. 'Ifhe pintle .2! 'pivotallysupports a cover 22 for thefriotchedout portion l2 of the housing I. The cover 22 is providedwith a straight top portion 23 .Which supports'V- shaped side wings24 adapted tov fit intothejnotch 'l {and completely close the same.

The squared on" top portion of the cover23 extends rearwardly of the limits of the notch IZand includes a downwardlyfacing seat 26 engaging around the pintle 2| The h'ottorn portiono f this seat is closedhy ahardened plate 2-? secured to the squaretop portion '23c f cover-"22 by a riyet 28. The. pintle 2! isfso placed .with reference tort he notch lzthat thecover. closes the notch I2 with theledges of the. side wings 2d engaging? the edges of the. notch to complete anair' conduit through the ho'using l. The sheet of filter material 2 rests onand covers the perforated plate lsl lhe snags, secured inplace by 'being clamped' between the edges of the cover 22 and the notch i2.

The filter housing I is provided with an upstanding spring housing 30 adjacent and rearwardly of the pintle 2| and the supporting ears 20 therefor. A still leaf spring 3| is mounted in the housing 30 and is secured thereto by means of a rivet 32. As clearly shown in Figure 1 the projecting portion of the leaf spring 31 underlies the rear edge of the hardened plate 21 so that in the position shown the force of the spring urges the closure 22 into the closed position shown in Figure 1 to form a tight seal with the edges of the notch l2 and against the filter paper 2. When the cover 22 is moved to open position it pivots through an are which is greater than 90 to a stop position in which the top portion 23 of the cover abuts an end of the housing 30. Since the rear edge of the plate 21 crosses to the right hand upstream side of a line from the center of the pintle 2| perpendicular to the face of the spring 3! when the cover is opened, the spring 3| urges the cover to open position. That is, the spring 3| resiliently retains the cover 22 in both open and closed positions and is in effect a snap acting device for this purpose.

In the use of the device, the filter housing comprising the casing l and its associated parts including the conduit section 3 and 4 are connected in a dusting tool hose and wand assembly between the suction cleaner and a dusting tool such as the element 6. These parts are assembled with the conduit section 3 connected to that part of the hose and wand system which is closest to the suction cleaner and hence upstream with reference to the direction of air flow. The cover 22 is then snapped to the open position shown in Figure 2 and a small sheet of filtering material 2, such as paper, is placed within the notched out portion of the housing 1 against the plate [5. The cover 22 is now snapped to closed position which seals the interior of the housing and firmly secures the filter sheet 2 in place against the screen IS. The suction cleaning apparatus is now operated in the usual manner to clean furniture, walls, draperies, rugs or other material during the course of which the dirt picked up will flow through the tool 6 and conduit 4 into the housing I and be caught upon the filter material 2. After a short period of cleaning operation the suction cleaner is shut ofi and the cover 22 is moved to open position to allow removal of the paper 2 so that a prospective purchaser may have visual evidence of the dirt which was removed by the dusting tool 6.

If desired the upper squared out portion 23 of the cover 22 may include a transparent insert so that the accumulation of dirt upon the filter 2 may be watched as the cleaning operation progresses.

The present invention provides a simple, effective filtering element for suction cleaning dusting tool suction air conduit which always forms a continuous rigid portion of the air conduit and allows ready insertion and removal of filtering material without breaking, or pivoting the rigid connecting conduit which carries the filtering element.

While I have illustrated and described the invention in considerable detail, it is to be understood that various changes may be made in the arrangement, proportion and construction of parts without departing from the spirit of the invention or the scope of the appended claims.

I claim:

1. A dusting tool filter element comprising a hollow body adapted to be connected into and to form a part of a suction air conduit, said body having an opening extending across its top wall and part way through opposite side walls thereof, a closure plate for said opening including wall portions adapted to contact the edges of said opening in said body to seal the air passageway through said body, a partition structure extending entirely across the interior of said body including an imperforate section extending from the bottom wall thereof to the edges of said opening and a perforated section extending from the end of said imperforate section to the side and top wall edges of one side of said opening.

2. A filter element comprising a hollow body adapted to be connected into and form a part of a suction air conduit, said hollow body including a filter section having a deep V-shaped notch cut therein with the apex of the said notch terminating above the bottom wall of said hollow body, a partition extending across the interior of said hollow body including an lmperforate section extending from said bottom wall up to the apex of said V-shaped notch and a perforated section extending in the plane of one side of said V-shaped notch from the top of said imperforate partition to said top wall, and a cover member shaped to fit said V-shape nctch mounted on said body for movement into open and closed positions.

3. A filter element comprising a hollow body adapted to be connected into and form a part of asuction air conduit, said hollow body including a filter section having a deep V-shaped notch cut therein with the apex of the said notch terminating above the bottom wall of said hollow body, a partition extending across the interior of said hollow body including an imperforate section extending from said bottom wall up to the apex 0f said'V-shaped notch and a perforated section extending in the plane of one side of said V-shaped notch from th top of said imperforate partition to said top wall, and a closure member for said V-shaped notch including a top portion and V-shaped side portions adapted to engage the marginal edges of said notch to seal the same, said closure member being mounted on said body for movement into open and closed positions with respect to said notch.

4. A filter element comprising a hollow body adapted to be connected into and form a part of a suction air conduit, said hollow body including a filter section having a deep V-shaped notch cut therein with the apex of the said notch terminating above the bottom wall of said hollow body, a partition extending across the interior of said hollow body including an imperforate section extending from said bottom wall up to the apex of said \'-shaped notch and a perforated section extending in the plane of one side of said V-shaped notch from the top of said imperforate partition to said top wall, and a closure member for said V-shaped notch including a top portion and V-shaped side portions adapted to engage the marginal edges of said notch to seal the same, said closure member including a portion projecting beyond the face of said notch opposite to said screen, means on said body pivotally mounting said projecting portion of said ment comprising a tubular body adapted to form part of a suction air conduit, said body having a portion thereof cut away to form a wide mouth opening in the top thereof, a partition extending from the bottom wall of said body to a junction with the margins of said opening, a screen extending across the body from the upper edge of said portion alon one margin of said opening and a cover plate movably mounted on said body, said cover plate being shaped to engage the margins of said opening to close the same.

'6. A dusting toolsuction air conduit filter element comprising a tubular body adapted to form part of a suction air conduit, said body having a portion thereof cut away to form a wide mouth opening in the top thereof, a partition extending from the bottom wall of said body to a junction with the margins of said opening, a screen ex tending across the body from the upper edge of said portion along one margin of said opening, 20

a cover plate shaped to engage the margins of said opening to close the same, means pivotally mounting said cover plate on said body, and snap acting means on said body engaging said cover plate for resiliently maintaining said cover plate in fully open or fully closed positions.

HARRY 13. WHITE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,006,031 Weatherly Oct. 17, 1911 1,327,377 Dick Jan. 6, 1920 2,046,636 Kitto July '7, 1936 2,184,406 Troxler Dec. 26, 1939 2,184,433 Reed Dec. 26, 1939 

